CeSOX: Short-Distance Neutrino Oscillations with BoreXino
- 6 Downloads
Several experimental anomalies in neutrino physics may point to the possible existence of one or more additional neutrino species that do not interact weakly, the so-called sterile neutrinos. The third phase of the Borexino experiment (SOX) is devoted to verification of this hypothesis. Within the first stage (CeSOX) the count rate of antineutrino events in the liquid scintillation detector from the artificial source 144Ce–144Pr placed in the special pit beneath the setup will be measured. The smaller antineutrino flux, as compared to the original one, would indicate the presence of oscillations into sterile states. This paper gives a survey of the CeSOX experiment, including the general description, the characterization of the radioactive source and the specific features of its use, the description of the method for data analysis, and the expected results. Depending on the significance of the obtained scientific information, the decision on carrying out the second stage of the SOX experiment with the 51Cr source of electron neutrinos will be made.
I thank the organizers of the conference for the great opportunity to attend and deliver the report. I am also grateful to my scientific advisor A.S. Chepurnov (NPI MSU) and the colleagues of the Borexino/SOX collaboration.This work was supported by the Russian Foundation for Basic Research, project no. 16-29-13014.
- 6.C. Patrignani et al. (Particle Data Group), “Review of particle physics,” Chin. Phys. C 40, 100001 (2016); http://pdg.lbl.gov/.Google Scholar
- 16.C. Giunti, “Status of the sterile neutrino(s),” Report on 10th Anniversary of Borexino on Recent Developments in Neutrino Physics and Astrophysics, Assergi and L’Aquila, Italy, Sept. 4–7, 2017; https://goo.gl/C1QJCY.Google Scholar
- 19b.Phys. Rev. C 85, 029901(E) (2012).Google Scholar
- 20.F. P. An et al. (Daya Bay Collab.), “Evolution of the reactor antineutrino flux and spectrum at Daya Bay,” Phys. Rev. Lett. 118, 251801 (2017); arXiv:1704.01082v2.Google Scholar
- 21.K. N. Abazajian (Int. Neutrino Commun.), “Light sterile neutrinos: a white paper,” arXiv:1204.5379v1 (2012).Google Scholar
- 22.G. Alimonti et al. (Borexino Collab.), “The Borexino detector at the Laboratori Nazionali del Gran Sasso,” Nucl. Instrum. Methods Phys. Res., Sect. A 600, 568 (2009); arXiv:0806.2400v1.Google Scholar
- 26.M. Agostini et al. (Borexino Collab.), “Spectroscopy of geo-neutrinos from 2056 days of Borexino data,” Phys. Rev. D 92, 0311012015; arXiv:1506.04610v2.Google Scholar